12021613 has 8 divisors (see below), whose sum is σ = 12373632. Its totient is φ = 11673696.

The previous prime is 12021593. The next prime is 12021629. The reversal of 12021613 is 31612021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5506 + ... + 7372.

It is an arithmetic number, because the mean of its divisors is an integer number (1546704).

Almost surely, 2^12021613 is an apocalyptic number.

It is an amenable number.

12021613 is a deficient number, since it is larger than the sum of its proper divisors (352019).

12021613 is a wasteful number, since it uses less digits than its factorization.

12021613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12021613 is about 3467.2197795929. The cubic root of 12021613 is about 229.0802144574.

Adding to 12021613 its reverse (31612021), we get a palindrome (43633634).

The spelling of 12021613 in words is "twelve million, twenty-one thousand, six hundred thirteen".